Eh oop, I tried to edit my wiki page and I got a big:
A database query syntax error has occurred. This may indicate a bug in the software. The last attempted database query was:
(SQL query hidden)
from within function "SearchMySQL::update". MySQL returned error "145: Table './spamusers_wiki/Wiki_searchindex' is marked as crashed and should be repaired (localhost:/tmp/mysql5.sock)".
I thought the problem may be caused by something I'd typed, so to test I just clicked to edit, didn't change anything, and saved, and got the same message.